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(No Model.) I I L. HUNTOON.

HOT WATER HEATING APPARATUS.

No. 369,287. Patented Aug. 30, 1887.

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UNITED STATES PATENT Erica.

LAFAYETTE 'HUNTOON, OF NATIOK, MASSACHUSETTS, ASSIGNOR TO ELWIN O. HUNTOON, OF SAME PLACE.

HOT-WATER H EATING APPARATUS.

SPECIPICATIQN forming part of Letters Patent No. 369,287, dated August 30, 1887.

Application filed June I, 18 86. Serial No. -203,932. (No model.)

To all whom it may concern.-

Be it known that I, LAFAYETTE Hunroon, of Natick, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Hot-\Vater Heating Apparatus, of which the following is a specification.

My invention relates to hot-water heating apparatus, and has for its object to provide improvements in contrivances of that character whereby perfect circulation of the heated water is secured, safety from overflow is provided, each radiator made independent of each and every other radiator by being directly connected by a supply and return main with the boiler, and otheradvantages attained, all as will be hereinafter described, and sub-- sequently set forth in the claims.

Of the drawings hereto annexed and forming a part of this specification, Figure 1 represents what may be presumed to be a sectional elevation of a portion of a house of several stories, showing the manner of applying and using myimproved heatingapparatus.

Fig. 2 representsa horizontal section taken on the line 3 y of Fig. 1. Fig. 3 representsavertical section taken on the line at a of Fig. 2. Fig. 4 represents a perspective view of the water chamber or reservoir, partbeing broken 0 away to better show the construction. Fig. 5 is a detail sectional view on an enlarged scale.

Similar letters of reference indicate similar parts in all the figures.

In Fig. l of the drawings, let a represent the 5 side of a building, and 1, 2, 3, and 4 the doors or stories thereof.

In carrying out my invention and applying it to a building of the character mentioned, I provide a boiler or water-chamber, b, of the ac form shown in Fig. that is to say, having a cylindrical body, a, and a square top, d, and square bottom e, the sides of the square top and bottom being at the center of their length flush with the side of the cylinder. The cen- 5 ter of the boiler or water-chamber is made hollow, as represented at f, which hollow f forms or constitutes the fire pot or chamber. Surrounding the outer walls of the boiler is a shell or jacket, 9, constituting a smoke or heat chamber, A, said jacket g being arranged at some distance from the outer walls of the boiler, so that the fire-pot will comprise the hollow chamber formed by the interior wall of the boiler, thelatter being constructed of an outer and interior wall or jacket with a space thercbetween, while the smoke or heat chamber will comprise the space between the outer wall of the boiler and the outer jacket, g.

A grate of suitable construction and so arranged as to enable it to be readily manipu- 6o lated is arranged at the bottom of the fire-pot, and below this is the usual ash-receptacle properly inclosed, the whole being supported on legs such as are usually provided to support a stove, as shown in Fig. 1, or in any 6 other suitable or convenient manner.

A door, z, is hinged to the base to provide means of access to the ash-pit, and a small door, 3', is also hinged to the base to permit of shaking or otherwise manipulating the grate. Another door, It, is hinged to the top of the casing 51 over the fire-pot f, by means of which fuel may be supplied to the fire in the fire-pot.

Upon the upper floor, 4, I construct a watersupply tank, Z, having a branch pipe, m, extending from the bottom of the tank and connecting with the supply-main n, which in turn communicates with the square-bottom portion 6 of the boiler. The connecting branch m is provided at any suitable point-say at o-with a cheek-valve of ordinary construction, and adapted to be seated when operated in the direction indicated by the arrow marked on Fig. 1. 85

Each radiator or heating coil p is provided with an independent main, q, extending between the upper square-top portion, d, of the boiler and the uppermost pipe of the radiator or coil, and an independent return-main, a", connecting the lowermost pipe of the coil with the square-bottom portion 0 of the boiler. Each radiator is also provided with a stop cook or valve, 8, at a point, in this instance, where the main g connects with the coil 19. a

At the upper end of the supply-mainn there is a small tank or receptacle, t, capable of containing water, which reeeptaclet is connected with the tank Z by means of a short siphonlike pipe, 11., one end of which extends into the otherwise closed top of the receptacle and the other into the bottom of the tank.

The smoke-chamber h is provided with exits v v, to one or both of which a smoke-pipe, w, connectingwith a chimney, may be attached. When but one smoke-exit is made use of, the other may be closed in any suitable way.

The manner of using my improved heating apparatus may now be described as follows: The tank and boiler being supplied with water and fire kindled in the fire-potf, the heat,circulating around all sides of the water-cham her I) and over the top of the same, soon causes the water to boil, the agitation consequent upon which causes the heated water to flow up through the mains q at the top of the waterchamber, through the radiator-coils 1), and back through the return-mains 1'- to the bottom of the water-chamber. Should the water become heated to a degree which would prevent a full and free circulation through the radiator, or so as that it would cause an undue pressure on the boiler-or pipes, it will rise through the supply-main n, and, by being shut off by check valve 0 from branch pipe m, flow into receptaclet and out through siphon-pipe a back into tank 1, from whence, after being cooled,

, it is returned to the boiler or water-chamber b, as before. If it is desired to shut off the heat from any particular radiator or coil 1), all that is necessary is to close the stop valve or cock 8 of that particular coil, which will leave the heater free to operate on the remaining radiators or coils entirely unaffected by having been shut off from one.

As has been indicated, an important feature of my invention resides in the fact that each radiator or heating coil is supplied with an individual supply and return main connected directly with the boiler, and as it is desirable to have said mains lead from the boiler in the same line and plane, by constructing said boiler with a square top and bottom, as described, I am enabled to easily and effectually secure this result, since, as is well known, holes can easily be drilled in the plain flat sides of the square top and bottom and the mains securely attached thereto and led therefrom in the manner described, when this would be difficult, and with the same number of mains shown in the drawings impossible, on a cylindrical surface. Furthermore, as it desirable to form, the shell or jacket of the heater in square form the square form of the top and bottom of the boiler serves to insure its maintenance in proper position in the case. Again, I am enabled by this construction to present a large amount of boilersurface to the heat and secure a perfect. circulation to the latter,

fully utilizing it to the end of securing economy in the use of fuel and easily and quickly heating the water in the boiler.

Though I have here shown my heating apparatus as applied to a fourstory house, it is obvious thatit can beapplied toabuilding having a greater or less number of stories, and that any number of radiators within the capacity of the heater may be connected therewith, each being in all cases supplied with an independent supply and return main connected directly with the hot-water chamber or boiler.

hat I claim is 1. The combination, with a series of radiators, of a hot-water heating apparatus, a series of individual supply and return pipes between said apparatus and radiators and a supply-tank, a pipe, 11, a branch pipe, m, connecting said pipe n and tank, and having a check-valve, as described, a supplemental tank or receptacle, and siphon-like pipe at, affording a connection for the pipe at with the main tank, substantially as set forth.

2. In a hotwate'r heating apparatus, the combination of the central cylindrical waterchamber, the rectangular upper and lower supply and discharge chambers, the jacket or wall surrounding said water-chamber forming a smoke'ehamber, the series of supply-pipes connected to one side of theupper rectangular supply-chamber, the radiators to which said supply-pipes are connected, the individual return-pipes of said radiators connected to the said lower rectangular water-chamber, the main supply-pipe, and the tank to which the same is connected, substantially as shown and described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 26th day of May, 1886.

LAFAYETTE IIUNTOON.

Vitnesses:

C. F. BROWN, JOHN A. RENNIE. 

